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Imagine these technological marvels: drugs that seek out and destroy cancer cells, paint that changes color when viewed from different angles, molecular "ink" that encodes millions of pages of information in a square inch, and contact lenses that let you check your blood sugar by just looking in the mirror.
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Those and a host of other innovations are already here, or soon will be, thanks to a scientific revolution called nanotechnology, which promises to change our world as profoundly as did electricity and the internal combustion engine.
Nanotech researchers create new materials in two main ways. They can reduce the ...